--- wait_on.h
+++ wait_on.h
@@ -17,6 +17,9 @@
 #define H_FLAG	0x02	/* want output in human readable form as well */
 #define I_FLAG	0x04	/* want to know which file the event occured to */
 #define W_FLAG	0x08	/* only interested in writes */
+#define P_FLAG	0x10	/* only interested in PIDs */
+#define Q_FLAG	0x20	/* silent */
+#define X_FLAG	0x40	/* only interested in exits */
 
 /* return values for !-i */
 #define EXIT_BASE		0
@@ -28,9 +31,17 @@
 #define EXIT_LINK		5
 #define EXIT_RENAME		6
 #define EXIT_REVOKE		7
+#define EXIT_EXIT		1
+#define EXIT_FORK		2
+#define EXIT_EXEC		3
+#define EXIT_TRACK		4
+#define EXIT_CHILD		5
+#define EXIT_TRACKERR		6
 
 void display_human(struct kevent *event);
+void display_human_p(struct kevent *event);
 int what_happened(struct kevent *event);
+int what_happened_p(struct kevent *event);
 int which_happened(struct kevent *event, int file_count, char *const filenames[]);
 
 #endif